Information in this section pertains to all global PEN® partners except where country flags are
visible. Click on the flag(s) for country-specific information. If a country flag is not listed, there is
no information specific to that country.
- WHO has set a guideline of a maximum value of 5 mg/L for chlorine as a residual disinfectant in drinking water.
- The Australian Drinking Water Guidelines requires that the level of chlorine in drinking water should not exceed 5 mg/L (5 parts per million).
- Trihalomethanes (THM) guidelines are set at 0.250 mg/L.